BW Technologies Unique cartridge technology enables the Impact range of portable multi-gas monitors to monitor and display up to four gases simultaneously. The pre-calibrated cartridges use high specification flammable, oxygen and toxic sensors to ensure that safe, accurate and reliable measurements are always made. Convenient to Use; Self contained package; Pre-calibrated, ready to go; No need to return instruments to central location; Can be replaced in the field. Full instructions included with every cartridge; Single captive screw fitting mechanism; Asymmetrical design ensures cartridge can only be fitted one way; Minimal training required. Countdown to replacement or calibration included as standard; Minimizes unexpected failures; Maximizes availability to the user; Provides predictive cost of ownership. High specification sensors; Stable and accurate; Poison resistant catalytic bead or IR cell for flammable; Electrochemical and patented SureCell technology for toxic; Over 30 years manufacturing experience. Gas specific data held on smart cartridge; Three levels of instantaneous alarm and time weighted average alarms on toxic; Pre-set limits adjustable via PC if required. For use with Impact and Impact Pro portable multi-gas monitor for the protection of personnel from up to four hazardous gases in the working environment. Easy fit single captive screw with asymmetric design to prevent incorrect fitting by user. RFI shielded polypropylene caseworks for increased reliability and performance. Humidity range: Continuous 20 to 90 percent RH. Intermittent 0-99 percent RH non-condensing. Each cartridge is supplied in sealed container complete with installation instructions, calibration certificate and spare pump seal.